The70’s
Well-Known Member
My buddy has an outdoor plant and i just measured 2200par from the Sun 
. Its 4pm clear sky.
My indoor LED’s are 600par
. Its 4pm clear sky.My indoor LED’s are 600par
Sun light vs LED light intensity
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Who says you have to?My buddy has an outdoor plant and i just measured 2200par from the Sun
My indoor LED’s are 300-400par, why do i have to stay between 300-400par ??????
Far as I'm concerned there are no rules so long as the plants are growing
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The70’s
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The70’s
Well-Known Member
There is talk of powerful lites that can cause an increase in metabolism (i think) and the draw of excess nutrients which causes leaf burns, but my buddy’s plant is incredibly healthy
The majority of sunlight is not used by plants
Grow lamps tend to be tuned to specialized PAR, so a lower number is theoretically equal
Lamp marketers tend to sell you the minimum requirements to make it cheaper to buy
Nutrient marketers tend to sell you the maximum possible doses
Disastrous combination
This.
And also.. Sunlight and grow lights can’t be compared. You’re trying to compare nuclear fusion to a series of Light Emitting Diodes or less. Nuclear fusion that has had billions of years worth of a head start on creating life, and millions of years growing cannabis. LEDs have been doing it for maybe 50-60 years.
Aside from that.. more often than not it’s not the grow lights that are the problem. It’s the fact that we put a weed in a container. This plant wasn’t meant to grow in a container. The moment you decide how big the plants roots can get, and what access it has to nutrition and water is the moment you become responsible for its health.
more like 25. we ran led (white light and color balanced spectrum) before they were commercially available.
the first led grow lights were re-purposed show production lights. everyone in the show industry was aware of how they could be used before the grow industry produced any. they've only been around for about 25 or maybe 30 years.
I was referring to NASA experiments in 88 with LEDs so 35 years ago.. we were both close but if it was the price is right then you won
I assumed that if NASA was running experiments in 88 then they had already done a few trials to initiate the experiments, especially since LEDs have been around since the 60s. However if we’re talking commercial horticulture purposes then yeah more like 25-30 at best.
I had looked the history of LED lighting last year after asking myself a similar set of questions.
The first basic working concept of LED lighting was discovered in 1907 but it did not go anywhere for decades.
In the early 1960s interest in using Light Emitting Diodes to build lights as we know them developed. It took until the early 70s that practical lights were being developed but they were still a good bit away from the better spectrum lights that we have today. So, we could say about 50 years.
I can remember that we talked about inside growing in the 70s but the electricity costs, the heat issue, and the cost of the light fixtures of the non-LED lights available back then kept us away. But we did know enough about the LED technology to figure that it would be the way to go once the spectrum issues were worked out.
I think it was in the 90s that more complete spectrum lighting became available but it was going to take some time before they caught on with the public.
Now we can go into a big box store and find a very limited choice in incandescent bulbs, about impossible to find those curly-Q Compact Florescent Lights, and just about everything is LED in one form or another.
The first basic working concept of LED lighting was discovered in 1907 but it did not go anywhere for decades.
In the early 1960s interest in using Light Emitting Diodes to build lights as we know them developed. It took until the early 70s that practical lights were being developed but they were still a good bit away from the better spectrum lights that we have today. So, we could say about 50 years.
I can remember that we talked about inside growing in the 70s but the electricity costs, the heat issue, and the cost of the light fixtures of the non-LED lights available back then kept us away. But we did know enough about the LED technology to figure that it would be the way to go once the spectrum issues were worked out.
I think it was in the 90s that more complete spectrum lighting became available but it was going to take some time before they caught on with the public.
Now we can go into a big box store and find a very limited choice in incandescent bulbs, about impossible to find those curly-Q Compact Florescent Lights, and just about everything is LED in one form or another.
all non-led lighting is being phased out. in every single industry. in europe and canada there is even legislation backing it up. it will be a long time frame though, as the majority of all lighting is still old tech.
The US passed legislation to phase out the incandescent bulbs used for ordinary commercial and residential lighting over a period of several years. The next president used some sort of presidential power to rescind that legislation and allowed the manufacture and the importing of those bulbs to start back up.
Nobody noticed and nobody cared and most stores did not go back to stocking incandescent bulbs. Instead the LED market continued to increase in quantity and quality to meet the increasing demand. The current president brought back the phase out of incandescent lighting and no one cried out in anguish.
all new cars use led lighting now. headlights, tailights, dashlights, etc. it's become an issue when retrofitting classics.
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The70’s
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Was there a main goal in LED production ?
Were grow lights an unintended consequence of….
Were grow lights an unintended consequence of….
Yes, low energy, maximum output, minimal heat I guess
I would think that over the years while the latest generation of LED light technology was being developed the scientists were always looking at what and how to improve the designs for grow lights to be used by the commercial greenhouse farming industry.
If anything, the use of the light emitting diodes, ballasts, drivers, the technology, and the designs that are behind the current generations of Cannabis grow lights were the unintended consequence.
a lot of led light tech was based around fibre optics. the first uses were mostly directed to data transmission. the field grew out from there into other industries.
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